Truck trailer



FIG. 1 is a perspective view of the bottom, front and left side of a truck trailer showing my new design;

FIG. 2 is a perspective view of the top, rear and right side thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a rear elevational view thereof. 

The ornamental design for a truck trailer, as shown. 